mcgowan



(No Model.) 2 Sheets-Sheet 1.

J. C. MQGOWAN.

SEWER.

No. 596,531. Patented Jan. 4,1898.

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(No Model.) 2 Sheets-Sheet 2. J. G. MOGOWAN.

SEWER.. l

Patented Jamil, 1898.

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UNITED STATES PATENT OFFICE.

JOHN O. MCGOWAN, OF WASHINGTON, DISTRICT OF COLUMBIA, ASSIGNOR OF ONE-HALF TO ORSON G. MCOALL, OF SAME PLACE.

SEWER.

SPECIFICATION forming part of Letterslatent No. 596,531, dated January 4, 1898.

Appiicaion nea December 19,1896. sentira. 616,337. (Nonnen A To a/ZZ whom it may concern:

Be it known that I, JOHN O. MCGOWAN, a citizen of the United States, residing at Washington, (Georgetowm) in the District of Oolumbia, have invented certain new and useful Improvements in Sewers 3 and I do hereby declare the following to be a full, clear, and eX- act description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention has reference toa construction in sewers and drain-conduits for the purpose of disposing of the sewage of cities and also a novel system for treating and disposing of sewage.

The invention consists in the features of construction and in the system hereinafter fully described and specifically claimed.

In the accompanying drawings, forming a part of this specification, Figure l is a vertical section illustrating a sewer constructed in accordance with this invention. Fig. 2 is a vertical section of the same, illustrating the manner in which these improvements can be applied to sewers now in use. Fig. 3 is a horizontal section taken on the lines `3 3 and 3 3 of Fig. l.

The primary object of this invention is to give a primary sewer or drain-conduit a sufficient fall, the lack of which is the greatest objection tothe same and which causes the most unsanitary conditions.

In accordance with the principle involved I propose to construct what is termed a main discharging-sewer that skirtsthe territory to be drained and which can be placed at any depth that is sufficient to give the requisite fall to the primary sewers or'conduits. This main discharging-sewer can be placed any depth necessary and can be of any length desired, for the purpose of bringing its mouth to a point to give the desired inclination, or the main discharging-sewer may be provided with a pump for the purpose of removing the liquid therefrom. In this way it is seen that instead of depending upon the body of water adjacent the territory to be drained, and owing to the level of which it is impossible in most cases to give the primary sewers or conduits the requisite fall,

the said primary sewers or conduits can be set at any inclination consistent with the depth of this main discharging-sewer, which is obvious.

I will now proceed to describe the exact construction shown in`Figs. l, 2, and 3, in which the arrangement is made for carrying off the sewage of a city.

In the figures of the drawings, l indicates the primary sewer leading from the city, and 2 the body of water or a source from which water may flow. It is understood that this invention can be applied either to tide-water or inland cities. The said primary sewer l communicates at its mouth with what I term a gravity-sewer" 3, and also an intake 4, which latterl also communicates with this gravity-sewer 3. The intake ft is further in communication with the body of water 2, or the source from which water may iiow, and the gravity-sewer 3 communicates at its lower end with the main discharging-sewer 5. This construction is shown in said Figs. l, 2, and 3, while the only difference between the said figures is that in Fig. l the intake 4. falls Vfrom its mouth toward the opening 6, where it communicates with the gravity-sewer,while in Fig. 2 the inclination of the intake is in an opposite direction, thus illustrating the manner in which this invention can be applied to the old sewers of tide-water cities.

It will be noted on inspecting Fig. I that both the primary sewer l and the intake Li This ofcourse n incline toward the opening 6. is the most approved construction for this system of sewers when being constructed in the iirst place; but, as before pointed out, it is possible to change the sewers now in use in accordance with this invention, and this idea is exemplified in Fig. 2. In this figure the primary sewer l and intake at are supposed to have formerly been an ordinary sewer leading to the body of water as they are now constructed, and in changing the system the inclination toward the mouth of the old sewer is not interfered with, but the opening 6 leading to the gravity-sewer is made so that the water passes in from the body of water into the intake, and instead of backing up into the primary sewer, as it does at high tide, it will flow into the gravity-sewer through this opening. The mouth of the intake is below IOS the level of the body of water, which causes a iow of water to pass constantly therefrom through the opening 6. Of course it is understood that in tide-water citiesand especially in connection with old sewers, where at the ebb-tide the level of the water is below the level of the mouth of the sewer, this flow of water from the intake to the gravity-sewer is intermittent and only when the tide is high enough, as is obvious.

In Fig. 3 I have shown, in dotted lines to the right of said ligure, the manner in which it is possible to place the gravityand the main discharging sewers otherwise than is shown in Figs. l and 2. In Figs. 1 and 2 the main discharging-sewer 5 is near the body of'water, while the gravity-sewer is situated directly below the intake, and therefore is not seen in the part of Fig. 3, taken on the line 3 3, although `it is shown in that part taken on the line 3 3a. The dotted lines to the right of Fig. 3, however, show that the gravity-sewer can lead from the juncture of the prfiinary sewer l and the intake and at an angle thereto and also away `from the body of water to the main discharging-sewer, which can be located in the most convenient position according to the judgment and discretion of the engineer. It is understood, of course, that the main discharging-sewer that skirts the territory to be drained and which is in communication with all the primary sewers l can be sunk to any depth and emptied either by'being carried far enough to reach low ground or by means of pumps. By placing these main discharging-sewers at the desired depth it is seen that they can have a considerable fall andl at the same time the fall of the primary sewers l can be arranged as found most expedient and necessary to give the correct drainage. In any case, however, it is possible to place the main discharging-sewer low enough to aord the desired fall for the4v primary and gravity sewers. It is seen that the water entering the intake meets the sewage from the primary sewers and intermixes with the same in iiowing into the gravity-sewer, so that the sewage is diluted and in such proportion that when it passes from the main dischargingsewer it will have the consistency of clear water. It is seen that in the first dropping into the gravity-sewer the sewage is mixed and commingled; and as a further and separate improvement I propose to place within the gravity-sewer the riflies 7, which consist of spiral grooves in the interior of said pipe, vso that as the mixed sewage and water passes through this gravity-sewer it is directed to one side by these spiral ritlies or grooves, so that it causes'a troubled now, which thoroughly intermixes and separates the sewage. It is seen, therefore, that the supply of water from the intake is rof suiiicient quantity to dilute the sewage suiiciently to prevent the decomposition of organic matter, and, further, the sewage does not enter the water near to or surrounding the city to be drained, and

this is unpolluted. Owing to the'fact, also, that there is a constant supply of water the sewage will be carried, owing to the rapidity of the flow, to the place of final disposal before decomposition commences.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-- 1. The combination with a primary sewer or channel open at its ends and which ends are alwaysv in communication with sources from which water may now, of a gravitysewer communicating at its upper end with said primary sewer or channel, and a main discharging-sewer communicating with the lower end of said gravity-sewer.

2. The combination with a plurality of primary sewers or channels which are open at their ends and which ends are always in communication with sources from which water inay flow, of a plurality of gravity-sewers communicating at their upper ends with the said primary sewers, and a main dischargingsewer communicating with the lower ends of said gravity-sewers. f

3. The combination with a primary sewer or channel and an intake communicating at all times with each other and with sources from which water may now, of a gravitysewer situated below the adjacent ends of said primary sewer and intake and communicating therewith, and a main dischargingsewer communicating with the lower end of said gravity-sewer.

4. The combination with an inclined primary sewer or channel, and an oppositelyinclined intake communicating at all times with sources from which water may flow and with the said inclined primary sewer or channel, 'of a gravity-sewer situated below the lower adjacent ends of said primary sewer and intake and communicating therewith, and a main discharging-sewer communicating with the lower end of said gravity-sewer.

5. The combination with a plurality of primary sewers, and a plurality of intakes, said intakes communicating at all times with a source from which water may iiow and with the said primary sewers or channels, of gravity-sewers having their upper ends communicating' at all times with said primary sewers and intakes, and a main discharging-sewer communicating with the lower ends of said gravity-sewers.

6. rIhe combination with a primary sewer or channel open at its ends and which ends are always in communication with sources Ifrom which water may flow, of a Agravity- `sewer communicating at its upper end with said primary sewer or channel, said gravitysewer having rifiies or grooves therein, and a main discharging-sewer communicating with the lower end of said gravity-sewer.

7. The combination with a primary sewer or channel open at its ends and which ends are always in communication with sources from which water may low, of a lgravity- IOO IIO

the primary sewers or channels and before reaching the main discharging-sewer and for thoroughly oommingling said sewage and I 5 water.

In testimony whereof I have signed this specioation in the presence of two subscribing Witnesses.

JOHN C. MCGOVVAN.

Witnesses:

J. H. BRADLEY, O. G. MCCALL. 

